Sandpapering-machine



2 Sheets-Sheet 2.

G. L. KNAUSS,

I SANDPAPERING MACHINE.

N0. 366,009. Patented Ju1y 5, 1887.

UNITED. STATES PATENT tries,

GEORGE L. KNAUS S, OF ALLENTONN, ASSIGNOR TO THE I-IYATT SCHOOL SLATE COMPANY, (LIMITED,) OF BETHLEHEM, PENNSYLVANIA.

SANDPAPERING-MACHINE."

SPECIFICATION forming part of Letters Patent N0. 366,009, dated July 5, 1887.

Application filed June 24, 1836. Serial No. 206,100. (No model.)

To all whom it may concern:

Be it knownthat I, Gnonen L. KNAUSS, a citizen of the United States, residing at the city of Allentown, in the county of Lehigh,

State of Pennsylvania, have invented certain new and useful Improvements in Sandpapering-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

IO This invention has relation to sandpaperingmachines adapted by certain features of construction to smoothing oppositesides of slate-- frames after the same have been applied to slates, the object of the invention being to pro- [5 vide means which shall automatically feed a series of succeeding slates to smoothing mechanism which finishes one side of each frame, which is afterward reversed by hand and sub mitted to a similar mechanism for the finish- 2o ing of the opposite side,when each slate is subsequently and automatically passed through and between cleaning and polishing mechan- 18111.

Other subsidiary objects of the invention and its various advantages will appear in the following description, and the novel features thereof will be particularly pointed out in the claims.

, Referring to the drawings, Figure 1 is a plan, and Fig. 2 a side' elevation, (parts being broken away on transverse lines to economize space in the drawings.) Fig. 3 is a central vertical section through the feeding and smoothing mechanisms at one end of the ma- 3 5 chine; and Fig. i is a side elevation, 011 an enlargedscale, of the pressurerolls and adjacent parts.

Like letters of reference-indicate like parts in all the figures 0f the drawings.

A represents the framework upon which the several elements ofthe machine are mounted, said frame-work being continuous and unbroken, although represented in the drawings as broken on a vertical transverse line and as 5 having a portion of one end removed for the purpose of permitting the illustration of the parts on a larger scale than would be possible if shown complete.

Upon the frame-work or table A are stand ards A, which serve as supports for the several devices arranged on the frame-work.

A represents a table or plate having guides A A" thereon, the latter being adjustable by means of binding-bolts and nuts A, which pass through slots A, formed in the bed. A single bolt and nut, A, in the guide A, permits of said guide being swung upon its bolt away from the smoothing-disk, as hereinafter described.

B B represent feedrolls, which may be of any usual construction, but which in this instance comprise a core, B, (see Fig. 3,) surrounded by a coil, B of rope or other flexible material. As usual in feed-rolls of this class the covering B may be made of rubber in the 6 5 form of atube slipped upon the core. The lower feed-roll, B, or, rather, the boxes B in which the journals of said rolls revolve, are supported in suitable ways formedin the standard A upon a bolt, 13*, threaded in the framework and having a set-nut, B whereby the said lower roll may be elevated ordepressed to adjust its upper surface in the same horizontal plane as that of the bed A The upper roll, 13, runs in similar boxes, which are surmounted by a hollow tube, B, (secured on the standard A,) having therein a coiled spring, (not shown,) and provided at its upper end with an adj usting-belt,l3 ,and set-nut Biwhere by the upper roll, B, may be adjusted to press upon the lower roll yieldingly. As shown, the two feed-rolls are geared to each other, so that motion given to one will be communicated to the other.

The smoothing-disk O is mounted upon a vertical shaft, 0, at the lower end of which is a hearing or journal-box, C", secured in any suitable manner to the frame-work A, and having in line with the shaft the adjustingbolt 0 provided with a set-nut, 0, whereby said shaft and smoothingdisk may be adjusted vertically to lie in a common plane with the bed A of the machine.

On the shaft 0 of the smoothingdisk is a flanged pulley, D, which serves the purpose of connecting the two smoothing-disk shafts O of the complete machine together by a belt, whereby uniformity of motion is given both disks.

It will be seen by reference to the drawings that the complete machine comprises two separate smoothing and feeding mechanisms, each of which is exactly like the other in detail, except as to the specific method of communicating motion from one to the other, as received from a main counter-shaft, hereinafter described.

So far as the details'are similar, similar letters of reference are used, and the description of one of said mechanisms is fully applicable to the other.

Upon the vertical shaft Gof the first smoothing-disk is a second flanged pulley, E, .which receives motion fromapulley, E, on the main counter-shaft F, which is provided with fast and loose pulleys F,Which receive the belt from the motor. The shaft of the lower feedroll, B, of the first smoothing mechanism is provided with two belt-pulleys, G G, the latter of which is connected by a belt with the pulley G of the second smoothing mechanism, whereby uniform motion is given to the feedrolls of both mechanisms. A pulley, H, on the main counter-shaft F, is belted to a pulley, H, on a shaft, H supported beneath the bed of the machine by hangers H and on the shaft Hflbeneath the machine,are mounted two pulleys, H and H the latter being connected by a belt .with the pulley G on the shaft of the lower feed-roll, B,whereby motion is imparted from the counter-shaft pulley H to the feedrolls of both machines, the several pulleys being proportioned in size to give the required speed of rotation of each of the moving parts operated.

Beyond the second smoothing mechanism there is mounted upon the bed a pair of revolving cleaning and polishing brushes, I, the bearing-boxes I of which are adjust-ably secured in the standard A by means of a T- slot formed therein and a T- rib, 1 onthe back of each bearing-box, a bolt, 1 servingto maintain each box in an adjusted position. Upon the end of the shaft of each of the brushes I is a belt-pulley, I", whereby each of the brushes may be connected to the pulley J mounted on the counter-shaft J in hangers J", depending from the frame-work. Upon the same shaft is apulley, K, which, by a suitablebelt, is connected with a pulley, K, on the main counter-shaft, whereby (said pulley K being smaller than the pulley H) a higher speed of rotation is given the brushes than to the feedrolls of the machine, whereby not only do the brushes remove the dust made in the smoothing operation, but they also act to polish the smoothed frames as they pass through and between said brushes.

In the drawings, wherever the location of the connecting-belts can be shown without rendering the illustrations confused said belts are shown by dotted lines.

The smoothing mechanism comprises a disk, L, preferably of metal, having a central hub, L, whichis mounted upon the vertical shaft 0. Upon themetal disk is mounted the smoothing-disk proper, 0, upon which is secured, by means of a band, C, a covering, 0 of sand-paper or other abrading material.

Screws 0 serve to retain the band and abrading material in position.

M M represent yielding pressure-rolls arranged above the smoothing-disk, for the purpose of holding the slate-frames in contact therewith. Each of the rolls M is mounted in bearings N, which are formed at the ends of the arms N, which are pivoted in blocks N secured to the bed A whereby each of said rolls may be swung upwardly over and away from the disk, so that when the guide A is swung therefrom, as heretofore described, free access is had to the disk for the purpose of applying new abrading material thereto. The pressure-rolls are yieldingly held by means of a coiled spring, 0, arranged about an eyebolt, 0, provided with set-nuts 0 which bolt projects through a T-block, O, and is pivoted in the base-block 0 secured to the bed A of the machine, between the two rolls. N" on the arms N rest beneath the lateral projections O of the T-block 0*,which block is perforated so as to move up and down on the eyebolt 0, said movement being permitted by the spring 0, arranged-on said bolt. When it is desired to raise the rolls M and throw them away from over the-disk, the set-nuts O on the bolt 0 are loosened, or the T-block is forced upward, and said bolt is thrown sidewise on its pivot, so that the projections O of the T-block are moved away from over the projections N of the arms N The adjustingbolts N in said arm serve to limit the downward movement of the rolls, and therefore determining their pressure upon the slates passing thereunder and over and along the smoothing-disk. 1

This" being the construction, the operation is as follows: One person introduces slates one Projections ILO after another at that end of the machine at one side of the frame is smoothed. As each slate passes out of the first machine, it is by a second person reversed and introduced into the guides of the second machine with the smoothed side upward, so that by means of the feed-rolls its unsmoothed side is presented to the second smoothing-disk C for a repetition of the operation performed by the first, after which theslate is automatically passed through between the cleaning and polishing rotating brushes I, from which it emerges smoothed and polished.

The pressure-rolls M may be of the same construction as that of the feed-rolls; but in view of the fact that the smoothed side of the slate-frame comes in contact therewith it is preferable to employ pressure-rolls having a coveiing of rubber or other non-abrading materia eration, what is claimed is- 1. The combination, with the counter-shaft F, provided with the pulleys E H K, of the frame A, provided with counter-shafts H J and with the independent smoothing and feeding mechanisms mounted on separate beds, and the final cleaning and polishing mechanisi'n T, substantially as specified.

2. The combination of the smoothing-disk O, pressure-rolls pivotally and yieldingly supported above said disk, the bed A, and the guide-strips pivotally and adj ustably secured to the bed, substantially as specified.

8. The combination of the rolls M, arms N, having bearings N, and blocks N with the adjustingbolts N and bed A substantially as specified.

4. The combination of the arms N1, having projections N", blocks N, T-blocl: O, cyebolt the single flanged pulley D, and the countershalt H J, having the pulleys J K, and the smoothing-rolls I, having the pulleys 1, sub stantially as specified.

In testimony whcreofI atfix my signature in presence 01' two witnesses. GEORGE L. KNAUSS.

Vitnesses:

Jaoon D. BURGER, EDWARD H. BENINGER. 

